<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            margin: 0;
        }
        .menu{
            display: block;
            padding: 5px;
        }
    </style>
</head>
<body>
    <div style="color: white;background-color: brown;top: 0;height:48px;left: 0;right: 0;">

    </div>
{#    #左侧#}
    <div style="position:absolute;top:48px;left: 0;bottom: 0;width: 210px;background-color:deepskyblue;">
        <a class="menu" href="/firstblood/user/">用户管理</a>
        <a class="menu" href="/firstblood/usergroup/">用户组管理</a>
    </div>
{#    #右侧#}
    <div style="position: absolute;left: 210px;background-color: #9acfea;top: 48px;right: 0;bottom: 0;overflow: auto">
            用户组

    </div>
</body>
</html>